Improvement in permutation-locks



H. GROSS. PRRMUTATION LOCK.

No. 108,134. Patented (m11, 1870.

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@initrd gitana HENRY GROSS, OF CINCINNATI, OHIO.

Letters Patent No. 108,134, dated october 11, 1870.

IMPRVEMENT IN PERMUTATION-LOCKS.

The Schedule referred to in these Letters Patent and making part of the same.

I, HENRY GROSS, ot' Cincinnati, in the county of I nilton and State of Ohio, have invented certain tnprovements in Permuta'tion-Locks, of which the following is a specification.

My invention relates to a device for preventing the engagement of the dog and tuinblers by feeling for the gates in the tumblers, and consists in an oval yoke, which carries the dog, and an internal lug, ot' a form adapted t entera recess in the driving-wheel attached to the spindle extending through the center of the tumblersv and the door of the safe or recepta cle, and connected with asuitable handle for manipulating and opening the lock.

Figure l is a perspective of a lock embodying my iaprovement, in which the inner case is removed, and the parts in place to permit the retraction ofthe bolt.

Figure 2 is an elevation ot' the same, showing the positions of the working parts when the bolt is ont.

Figure 3 is a cross-section ofthe lock taken through the spindle and dog.

Figures 4t and 6 represent a style oi' adjustable tumbler-s adapted for use in this and similar locks.

Figure 5 represents a modication of my lock to adapt it to the use of a locking-bolt, located within the lock, and to be protruded therefrom in locking, it being, in that respect, the reverse of thc other form.

Agis the operating stem secured, within the lock, to the driving-wheel B.

The face ot' the diivi1'1g-.vl1cel is recessed at n, con- 'centrically with the'axis of thestem A.

An elliptical yoke, C, is confined in the recess a of the wheel B by the cap C', which is secured to the driving-wheel.

The dog D,fsecnred to the inner surface of the yoke O, projects inward, and is entered in the gates b of the tumblers E, when the opening c, in the circular guard F, is in line with the corresponding opening el in the case G of the lock, in which position of the relative parts the bolt may be retraccd.

A lng, e, extends inwardly from the inner face of the yoke C, to which it is secured, at the same end of said yoke that is the dog D.

In form it is adapted to enter the rccessf, in the edge 0f the driving-wheel B.

'lhe yoke O bears upon its outer-face, ata distance from the pilla-r g, which carries the dog D. equal to` their width of face, the fingers 7L le'.

They engage the stops yi 1", attached to the circular guard F.

The circular gnartbstop k limits the throw of thc circular guard, being attached to the lock-case, and extending inwardly through the recess lin the circular guard F.

1n the modified forni ot` my improved lock, dclin cated in g. 5, the slide-bolt M may be operated by the same handle with which the tuniblcrs are manipulated.

An arm, M', attached to the top of the bolt M, has a vertical slot, in which moves the piu N, projecting from and secured to the arm D of the yoke C.

This arm D is in close'contact with the stop 7;,attachcd to the case of the lock, when thc dog is not gated in the tumblers.

Viren the yoke is permitted to drop, the bolt may be retracted, in which case thc arm D' passes freely beneath the stop la.

The operation ot' the lock may be thus described:

By means of a key, entered in theperforations p of the eccentrics J', the eccentrics are rotated in such a. manner as to liberate the serrated faces m of the free end of the friction-bars H from the rim n of the inner wheel I, rotating the driving-wheel B to forni a new combination, then turning the key in the eccentrics, to connect the rim G' and inner wheel I of the tumbler-s, the dog D, attached to the yoke C, not being gated. In the mean time, the opening c, in the circular guard F, is not opposite, or a continuation of the opening d in the case G of the lock, and, consequently, the bolt cannot be retracted. Any attempt to do so would impinge the inner end ofthe bolt upon the circular guard.

"hen the gates of the t-ninblers are in line, according to the combination, the dog D is entered in the gates L o' the tnmblers E, and the recessf, in the face ot the driving-wheel B, receives the lug e, projecting inward from the yoke C, the yoke having dropped upon the driving-wheel; the finger h being now liberated from the stop k, the driving-wheel may be rotated, and the fingers h h', engaging the stops t i', secured to the circular guard F, cause it to rotate until checked by contact ot' the stop L wit-h the opposite face ot' the recess l in the circular guard, when it will. be apparent that the openings c oi' the circular guard F and d in the case G are in line, then the bolt may be retracted, its inner end passing through the openings into the lock.

I claim as my inventionl. rlhc case G, provided with the opening :Zand stop 7.', in combination with the rotating guard F, provided `with the opening c and stops i, the yoke C, provided with the fingers It and lug e, and the notched operating wheel B, all constructed and arranged to operate substantially as described. u

i 2. The combination of the tnmblers E, the operating wheel B provided with the notch f, having its rear face inclined, the yoke C provided with the corresponding luge, and the'dog D, substantially as described.

HENRY GROSS.

Witnesses:

C. W. COLE, C. L. FISHER. 

